669104 has 40 divisors (see below), whose sum is σ = 1428480. Its totient is φ = 302400.

The previous prime is 669091. The next prime is 669107. The reversal of 669104 is 401966.

669104 = T₁₇ + T₁₈ + ... + T₁₅₈.

It is not an unprimeable number, because it can be changed into a prime (669107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9389 + ... + 9459.

It is an arithmetic number, because the mean of its divisors is an integer number (35712).

2⁶⁶⁹¹⁰⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (714240).

669104 is an abundant number, since it is smaller than the sum of its proper divisors (759376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669104 is a wasteful number, since it uses less digits than its factorization.

669104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 669104 is about 817.9877749698. The cubic root of 669104 is about 87.4643773361.

The spelling of 669104 in words is "six hundred sixty-nine thousand, one hundred four".